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Oil and detergent resistant powdery coating and preparation method thereof

A technology resistant to detergents and powder coatings, applied in powder coatings, polyester coatings, anti-corrosion coatings, etc., can solve problems such as dissolution and shedding, solvent intolerance, and restrictions on the application of powder coatings, and achieve the effect of preventing corrosion and expanding the application range

Inactive Publication Date: 2017-05-24
ANHUI MEIJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although powder coatings have many advantages, they also have some disadvantages, such as not being resistant to solvents, they will dissolve and fall off when they are used with organic solvents such as grease and detergent, which severely limits the application of powder coatings on kitchen appliances.

Method used

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  • Oil and detergent resistant powdery coating and preparation method thereof
  • Oil and detergent resistant powdery coating and preparation method thereof
  • Oil and detergent resistant powdery coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An oil-resistant and detergent-resistant powder coating comprises the following components in parts by mass:

[0027]

[0028] The preparation method of the above-mentioned oil-resistant and detergent-resistant powder coating comprises the following steps:

[0029] S1. Weigh each component according to the formula, pre-mix for 6-9 minutes, and stir with a high-speed mixer;

[0030] S2, adding the powder in the step S1 to the extruder for melt extrusion and tableting, wherein the temperature in zone I of the extruder is 90-100°C, and the temperature in zone II is 95-105°C;

[0031] S3. The flakes in step S2 are added to a pulverizer for grinding, wherein the main mill of the pulverizer is 45-50 Hz, the rotation speed of the auxiliary mill is 20-35 Hz, and the screen mesh is 180-200 mesh to obtain powder coating.

[0032] The resulting powder coating is electrostatically sprayed to the substrate and cured.

Embodiment 2

[0034] An oil-resistant and detergent-resistant powder coating, comprising the following components in parts by mass:

[0035]

[0036] The preparation method of the above-mentioned oil-resistant and detergent-resistant powder coating comprises the following steps:

[0037] S1. Weigh each component according to the formula, pre-mix for 6-9 minutes, and stir with a high-speed mixer;

[0038] S2, adding the powder in the step S1 to the extruder for melt extrusion and tableting, wherein the temperature in zone I of the extruder is 90-100°C, and the temperature in zone II is 95-105°C;

[0039] S3. The flakes in step S2 are added to a pulverizer for grinding, wherein the main mill of the pulverizer is 45-50 Hz, the rotation speed of the auxiliary mill is 20-35 Hz, and the screen mesh is 180-200 mesh to obtain powder coating.

[0040] The resulting powder coating is electrostatically sprayed to the substrate and cured.

Embodiment 3

[0042] An oil-resistant and detergent-resistant powder coating, comprising the following components in parts by mass:

[0043]

[0044] The preparation method of the above-mentioned oil-resistant and detergent-resistant powder coating comprises the following steps:

[0045] S1. Weigh each component according to the formula, pre-mix for 6-9 minutes, and stir with a high-speed mixer;

[0046] S2, adding the powder in the step S1 to the extruder for melt extrusion and tableting, wherein the temperature in zone I of the extruder is 90-100°C, and the temperature in zone II is 95-105°C;

[0047] S3. The flakes in step S2 are added to a pulverizer for grinding, wherein the main mill of the pulverizer is 45-50 Hz, the rotation speed of the auxiliary mill is 20-35 Hz, and the screen mesh is 180-200 mesh to obtain powder coating.

[0048] The resulting powder coating is electrostatically sprayed to the substrate and cured.

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Abstract

The invention discloses an oil and detergent resistant powdery coating. The coating comprises polyester resin, epoxy resin, a filler, titanium dioxide, a leveling agent, a light brightening agent, an antifoaming agent, a curing promoter and a pigment, wherein the polyester resin adopts carboxyl-terminated polyester resin with the acid value of 68-75 mgKOH / g and the glass transition temperature of 53-60 DEG C; the epoxy equivalent of the epoxy resin is 700-840 g / eq, and the softening point is 88-93 DEG C; and the curing promoter is closed isocyanate. The invention also provides a preparation method of the oil and detergent resistant powdery coating. The curing promoter is used to increase the cross-linking density of the coating, so a coating layer forms a dense film, corrosion of oil, detergent and other organic matters to the powdery coating layer is prevented, and the coating layer can resist a 40 DEG C detergent for 120 h and can resist 49 DEG C oil for 96 h.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, in particular to an oil-resistant and detergent-resistant powder coating and a preparation method thereof. Background technique [0002] Powder coatings are recognized as pollution-free and environmentally friendly products because of their solvent-free and low toxicity of raw materials. It is also necessary to pursue the improvement of quality, and to be able to meet the performance requirements of different fields. Although powder coatings have many advantages, they also have some disadvantages. For example, they are not resistant to solvents, and they will dissolve and fall off when they are used in applications containing organic solvents such as grease and detergents, which seriously limit the application of powder coatings in kitchen appliances. SUMMARY OF THE INVENTION [0003] In view of the above deficiencies in the prior art, the present invention provides an oil-resistant an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D163/00C09D5/03C09D5/08C09D7/12
CPCC09D167/00C08L2312/00C09D5/033C09D5/08C09D163/00C08L63/00C08K13/02C08K5/29C08K2003/3045C08K2003/2241C08L67/00
Inventor 王方银王峰张雪梅
Owner ANHUI MEIJIA NEW MATERIAL